States of Matter Review

Thermal energy moves from...

• hot to cold

• cold to hot

Sort the States of Matter from having the LEAST amount of thermal energy to the MOST amount of thermal energy.

• Solid, Gas, Liquid

• Liquid, Solid, Gas

• Gas, Liquid, Solid

• Solid, Liquid, Gas

What is "heat"?

• The motion of atoms or molecules within a substance

• The transfer of thermal energy from one object to another

• The average temperature of a system over time

• The average kinetic energy of the system as a whole

What happens when you REMOVE thermal energy from a system?

• Temperature decreases, average kinetic energy increases

• Temperature decreases, average kinetic energy decreases

• Temperature increases, average kinetic energy increases

• Temperature increases, average kinetic energy decreases

Which state of matter includes molecules moving or flowing together. Hint: it has definite volume and indefinite shape

• Solid

• Liquid

• Gas

• Plasma

Which state of matter includes vibrating molecules packed closely together. Hint: It has definite shape and definite volume.

• Solid

• Liquid

• Gas

• P:lasma

What happens when you gradually add thermal energy to something?

• Particles come closer together

• Movement increases

• Temperature drops

• Movement decreases

If a chemical reaction occurs, how can you best tell if thermal energy has been absorbed or released?

• There's a bright light

• There's a new smell

• There's a loud sound

• The temperature changed

What happens to the kinetic energy if thermal energy is ADDED?

• It increases

• It decreases

• It increases and decreases

• Nothing

An endothermic reaction...

• releases heat

• absorbs heat

• decreases in size

• increases in size